- Created by Unknown User (uscs), last modified by Helen Setchell on Jun 12, 2018
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This service will allow you to access the ECMWF public datasets . You will need to have an account on ECMWF web site. If you don't have an account, please self register at https://apps.ecmwf.int/registration/.
The procedure is very simple: the user writes a request, submits it and retrieves a file (grib or netcdf format) including the requested data.
This method allows users to download ECMWF public datasets in a programmatic way.
You can also try visiting https://api.ecmwf.int/v1/key/ to retrieve your credentials.
Note that the key expires in 1 year. You will receive an email to the registered email address 1 month before the expiration date with the renewal instructions.
The ecmwf-api-client library was added to the Python Package Index (PYPI):
Install via pip with:
pip install ecmwf-api-client
If you do not have admin privileges you can always install the client in your user space:
pip install --user ecmwf-api-client
Alternatively, if you have Anaconda installed you can install the Web API Python client library doing:
conda install -c conda-forge ecmwf-api-client
If you have Anaconda installed you can install the Web API Python client library doing:
conda install -c conda-forge ecmwf-api-client
Alternatively, you can first install Python (and pip) on your Windows environment.
- Download windows installer exe from Python.org download page
- Run the exe.
- Screen will be shown to chose the installation option.
- Uncheck "install for all user" option.
- Go for the custom installation.
- On next screen specify the directory path for which your user have full access on the computer (take a note of this as you will need it to set the environment variables).
- Uncheck "create shortcuts for installed application" option.
- Make sure "Add python to environment variable" option is Unchecked .
- Complete the installation.
Then add the installation and Script folder path in PATH using set (temporary) or setx (permanent) in a Command Prompt window. This is to make sure that your computer knows where to find the Python interpreter. To do this you will have to modify a setting called PATH, which is a list of directories where Windows will look for programs. Further details and examples are available here. You may choose also to set your environment variables into a batch file (e.g. set-env.bat which you will need to run from the Command Prompt.
@echo off
set PY_HOME=C:\...\python37
set PATH=%PY_HOME%;%PY_HOME%\Scripts;%PATH%
You can now install it via pip (see instructions above).
For languages other than Python please see Web-API Downloads
To check the availability of ECMWF Public Datasets go to the web interface:
http://apps.ecmwf.int/datasets/
Using this interface you can discover all the ECMWF Public Datasets that are available from our archive. We strongly recommend you to to navigate through our public datasets to become familiar with their availability. You may select a Public Dataset and start navigating trough its content.
Please take into account some considerations about the content:
- Different ECMWF Public Datasets include different "parameters" , "times", and "steps"
- In each ECMWF Public Dataset not all the "parameters" are available from all "steps"
- In each ECMWF Public Dataset not all the "steps" are available from all "times"
The web interface above will help you to check and understand the availability. For any kind of selections the system will update the attributes in a dynamic way to reflect the current availability. (i.e. if you change the steps some parameters will be added or removed).
Tip
- If you click on the ERA-interim http://apps.ecmwf.int/datasets/data/interim_full_daily/ you will get a web page reflecting the availability of this specific Public Dataset as the period that it is available, the forecast steps and the parameters that are available etc.
- From this page you have the option to define the values of your requests such as the "date", the "time" the "steps" and the "parameters" that you are interested in.
- In the case of ERA-Interim if you select time "06:00:00" only, the system updates the availability of the "steps" dynamically. In that case only the "step" 00 is available (checkable).
- Additionally if you select "step" 00 you will see that only a subset of the parameters are now available and only these parameters can now be checked.
Spend some time to understand how it works, make some selections try to execute the MARS scripts.
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